Metallic packing for piston and valve rods



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J. GOGKPIELD & G. D. HIGGINS.

METALLIC PACKING FOR PISTONAND VALVE RODS. No. 389,288.

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JOSEPH COCKFIELD AND CLINTON D. HIGGINS, OF BOONE, IOXVA.

METALLIC PACKING FOR PlSTON AND VALVE RODS.

SPECIFICATION forming part of Letters Patent No. 389.288, datedSeptember 11, 1888.

Application filed January 4, 1888. Serial No. 259,778.

To aZZ whom it may concern:

Beit known that W8,JOSEPH OooKFInLD and CLINTON D. HIGGINS, citizens ofthe United States, residing at Boone, in the county of Boone and Stateof Iowa, have invented certain new and useful Improvements in MetalPacking for Piston and Valve Rods, 850., of which the following is aspecification, to wit:

This invention relates to metal packings for piston and valve rods; andit consists in certain peculiarities of the construction and arrangementof the same, substantially as will be hereinafter more fully set forthand claimed.

In order to enable others skilled in the art to which our inventionpertains to make and use the same, we will now proceed to describe itsconstruction and operation, referring to the accompanying drawings, inwhich- Figure 1 is a side elevation of our gland and a part of the rod.Fig. 2 is a longitudinal section of the gland and sectional packing;Fig. 3, a cross-section on the line :0 :0, showing the end of thepacking-rings in elevation; and Fig. 4,asin1ilar view on the line 9 y,showingthe beveled joi ntbetween the packing-rings in elevation.

(t represents a gland of any suitable size formed with perforations a inits side, and a flange, a, for securing it in place upon a cylinder,valve'chest, or other place where it is to be used. In the inner end ofthis gland is titted a flanged bushing, a, of brass or similar material,and in the outer end is screwed a cap, I), also fitted with a flangedbushing, b, and both these bushings are centrally bored for the passageof the piston orvalvc rod 1/. Upon the rod between the bushings we placeour metallic packing, consisting of a metal ring, 0, made in two partsdivided transversely, as in Fig. 4. The inner end of this ring isbeveled, as at c, and fitted against it is the correspondiugly-bevelededge of the rings (1 d, one of which lies upon the other, and bothdivided into two parts, as in Fig. These rings are placed upon the rodand form square joints against the bushings, by which they are pressedtogether. The parts of the rings are held together by the openspring-rings c c,

(No model.)

one of which clasps the packing-rings closely and the other upon thefirst. It will be noted that the diameter of the packing-rings is suchthat they do not fill up the gland, but an an nular space, e is leftaround the packing, to which steam is freely admitted through theperforated sides of the gland, and this pressure tends to compress thesections of the packing upon the rod, and at the same time, by reason ofthe beveled adjoining ends of the rings, force them firmly against thebushings. This beveled feature also admits of an automatic ad justmentof the packing to accommodate any uneven motion or play of the rod inconsequence of lost motion between the cross-head and guide, wear, 8E0.

It will of course be understood at once that the various sections of therings are so placed as to break joints, as will be seen in the drawings.It will also be seen that the gland is so attached to the cylinder orchest as to project therein and admit the steam-pressure to the packing;but as this is a simple matter of mechanical construction readilycomprehended we have not deemed it necessary to illustrate it.

We desire of course to use any suitable material in the construction ofour invent-ion, and shall apply it to piston-rods, valve-rods, or anyother desirable parts of machinery to which it is applicable.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is

The combination, with the perforated gland a, provided with the bushingsc and b, and the rod b", of the packing consisting of the rings 0 cl d,and the spring-rings c c, placed upon the rod with a space, 0", aroundthem, substantially as and for the purpose shown and described.

In testimony whereof we affix mysignatures in presence of two witnesses.

JOSEPH COCKFIELD. CIJINTON I). HIGGINS.

\Vitnesses:

E. E. Fox, W. G. COLEMAN.

